Summary comparison data for meta-analyses
A comparison of analytic approaches for individual patient data meta-analyses with binary outcomes
... analyze data arising from IPD-MA across a wide range of data generation scenarios but made some ...two-level data structure, and no ...such data is in hand, we have addressed several open ...
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Multiple treatment comparison meta-analyses: a step forward into complexity
... treatment comparison meta-analyses point for progression of that patient is replaced by the time points of patients who were free of disease when that patient was censored, favoring the less ...
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Does Outdoor Education Really Work? A Summary Of Recent Meta-Analyses
... Three meta-analyses of the effects of outdoor education have been conducted (Cason & Gillis, 1994; Hans, 1997; Hattie, Marsh, Neill, & Richards, ...
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ANIMA: A data-sharing initiative for neuroimaging meta-analyses
... of data across many individual 17 task-based functional neuroimaging ...from meta-analytic studies typically include brain regions which are 20 consistently activated across studies for specific contrasts, ...
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Multiple Imputation for Individual Patient Data Meta-Analyses.
... In this chapter, we address the first three points by describing a joint model approach to im- putation for IPD meta-analyses. In particular, we show how introducing an inverse Wishart distribution (or ...
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The strengths and limitations of meta-analyses based on aggregate data
... from summary trial results or the published survival ...some summary data, the survival curve estimate of the log hazard ratio was nearly identical to that reported directly in the ...method's ...
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A comparison of heterogeneity variance estimators in simulated random-effects meta-analyses
... our analyses assume that all studies provide unbiased estimates of the true effects underlying ...and meta-analyses may be biased if studies are missing for reasons related to their results ...
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Individual participant data meta analyses should not ignore clustering
... cause analyses ignoring clustering to perform poorly, such as between-study heteroge- neity in effect or covariate ...IPD meta-analyses that ac- count for clustering generally perform consistently ...
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Methods for Meta–Analyses of Rare Events, Sparse Data, and Heterogeneity
... these comparison methods yields a type I error rate of about 30%! It is very clear that these methods do not produce reliable results when events are rare, and heterogeneity is ...
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Feasibility of individual patient data meta-analyses in orthopaedic surgery
... more data sharing among researchers and some journals [21, 22] that require authors to make the relevant anonymized patient-level data available on reasonable request and to provide a data sharing ...
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Intra-articular platelet-rich plasma injection for knee osteoarthritis: a summary of meta-analyses
... subgroup analyses of the different details of PRP injection, such as times of PRP injection, PRP spinning techniques, mean platelet concentration, PRP category, activation or not, and risk of ...included ...
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Technology integration in postsecondary education: A summary of findings from a set of related meta-analyses
... When educational researchers and practitioners join in public discussions about the value of modern learning technologies, researchers are encouraged to take at least a few steps beyond fashionable trends emanating from ...
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Environmental risk factors of pregnancy outcomes: a summary of recent meta-analyses of epidemiological studies
... A bibliographic search was carried out in December 2011 using MEDLINE (National Library of Medicine 2010). We limited our search to papers published in English and in the last 10 years. Initially we searched on “air ...
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Understanding, appraising and reporting meta-analyses that use individual participant data
... Reporting: Data checking • “Standard checks were used to identify missing data, assess data validity and ...missing data, and assessed data validity and consistency though logical ...
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A systematic review of individual patient data meta-analyses on surgical interventions
... To the best of our knowledge we are the first to study surgical IPDMAs, and illustrate the merits of this method within surgery. However, some potential limita- tions should also be discussed. First, our literature ...
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Managing variability in the summary and comparison of gait data
... We exemplify the above procedure with two kinematic data sets taken from a child with an above-knee amputa- tion, wearing two different types of prosthetic devices. Of interest is whether the use of a swing phase ...
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Airplane Crash Simulations: Comparison of Analyses Results with Test Data
... Airplane engine – Deformable missile Dynamic events are problems with high complexity and many unknown parameters. The subdivision of one problem into several sub problems, each focusing on a fairly isolated part of the ...
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Statistical analyses and quality of individual participant data network meta-analyses were suboptimal: a cross-sectional study
... ticipant data were often insufficiently reported in IPD indirect comparison studies [ 3 ...our analyses of ...aggregate data NMAs may have the same ...
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Community-based approaches for neonatal survival: meta-analyses of randomized trial data.
... earlier meta- analyses by other authors, we excluded two non-randomized trials 26 , 27 from our meta-analysis after an assessment of the risk of ...
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Preventing foot ulceration in diabetes: systematic review and meta-analyses of RCT data
... our meta-analysis, such an effect was not evident in any single ...pooled data, despite quite marked differences in the clinical care provided in the intervention arms of the trials and the participation of ...
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